JPS5829406B2 - Combined radial/thrust bearing - Google Patents

Abstract

An annular shoulder on the radial bearing is contacted by the thrust bearing raceway radially inwardly from the inside periphery of the thrust bearing cage. Either the thrust race or the annular shoulder on the radial bearing, or both, may have an integral axial extension with the thrust race and the radial bearing interlocking radially inwardly from the inner periphery of the thrust bearing cage.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combination radial thrust bearing.

More specifically, the present invention provides a novel combination radial and
This relates to thrust bearings.

In currently known combination radial-thrust bearings, when these bearings are installed in a mechanism, the radial bearing race is forced into the housing bore by pressing against the thrust bearing roller, which in turn presses against the thrust race. , the thrust race presses against the thrust race support wall to force the radial bearing race into the housing.

This installation forces often result in permanent indentations in the thrust race by the thrust rollers.

t of such currently used combination radial/thrust bearings.
An example is U.S. Patent No. 3.6, granted January 4, 1972.
No. 32,178.

It is highly desirable to have a combination radial-thrust bearing that can be forced into a housing bore without the possibility of permanent damage to critical parts of the bearing, including the thrust races.

In some cases it may also be desirable to manufacture the two parts of a combination bearing race as separate parts.

That is, the required dimensions of the mating bearing make it extremely difficult to form the mating race as one piece.

Sometimes it is desirable for the mounting to have a combination bearing that can be mounted to the housing as a separate member that functions as a second half combination radial-thrust bearing.

In summary, the novel combination radial-thrust bearing of the present invention provides a radial bearing having an axially extending rolling member radial raceway with a substantially radially inwardly extending annular portion. It consists of a bearing race and a separate thrust bearing race, at least a portion of which is in assembly contact with a radially extending annular portion of the radial race.

For assembly into the housing, the combination bearing is placed into the bore of the nozzing by pressing on a section of the thrust bearing race, which presses on said annular section.

Thus, while the combination bearing is pushed into the housing,
No pressure is applied to the thrust rollers and therefore the thrust bearing race does not dent due to such pressure.

The invention and its many advantages will be better understood by reference to the following detailed description and drawings.

Referring to FIGS. 2 and 3, the combined radial
The thrust bearing is shown in conjunction with a rotating shaft 10 having a large diameter portion 12.

The combination bearing is mounted within the bore 14 of the housing 16, and the rotating shaft is mounted within the bore of the bearing.

The combination radial thrust bearing has a radial bearing race 17 with an axially extending radial bearing raceway 18 for rolling members.

A substantially radially extending annular shoulder 20 connects the radial bearing race to the axial extension 22 .

The extension 22 has an outer diameter smaller than the outer diameter of the radial bearing race 17.

A radial bearing cage 24 with rolling elements 28 is arranged within the radial bearing race 17.

The construction of the bearing cage and the manner in which it is accommodated in the radial bearing race are not critical to this invention.

The cage may be housed axially between the annular shoulder 20 and the opposing end flange 26, or may be radially inward from the shoulder and end flange so that the roller ends can contact the race wall. You can also do this.

In some bearing constructions, the radial bearing cage is eliminated.

A thrust bearing race 31 having a radially extending thrust raceway 30 has an axially extending inner flange 32 at its inner end.

Although the thrust bearing race 31 and its inner flange 32 are comprised of separate members from the radial bearing race, they are in assembly contact with the radial bearing race.

This is accomplished by press fitting the inner flange 32 of the thrust bearing race 31 onto the outside of the axial extension 22 of the radial bearing race 17 into contact with the shoulder 20.

If desired, a permanent connection may be made by mechanical connection or by means of welding or gluing or pooling to permanently attach the separate thrust bearing race to the radial bearing race.

A thrust bearing cage 34 containing a rolling member such as a roller 36 in a pocket 38 is axially received by a projection 40 extending outwardly from an axially extending flange 32 of the thrust bearing race 31. .

The thrust bearing cage 34 has axial movement clearance, but is prevented from excessive axial movement or escape by the protrusion 40.

Of course, in order to hold the thrust bearing cage against excessive axial movement, instead of the ridge 40, a full rim, such as a full rim on the free end of the flange 32 of the thrust bearing race 31 overlapping the cage 34, may be used. Pond means may be used.

A coupling mechanism is provided to couple the thrust bearing race flange 32 and the extension 22.

A plurality of circumferentially spaced cutouts 42 (only one of which is shown in FIG. 3) are formed at the distal end of flange 32.

A plurality of protrusions 44 are also formed at the distal end of the extension 22 of the radial bearing race 17.

Each protrusion 44 extends into the cutout 42 to maintain the thrust bearing race 31 assembled to the radial bearing race 17.

A second thrust bearing race 46 is shown in the drawings.

However, if desired, the second thrust bearing race 46 may not be used, in which case the thrust roller 36 would bear directly against the large diameter portion 12 of the rotating shaft 10.

If the second thrust bearing race 46 is used,
A plurality of circumferentially spaced tabs 48 are formed on the outer flange of thrust bearing race 46 to assemble and retain thrust bearing race 46 to cage 34 .

In the embodiment shown in FIG. 4, outwardly extending portion 50 serves the same function as projections 40 and 44 in the embodiment of FIGS. 1-3.

The protrusion 50 in FIG. 4 is long enough to extend through the cutout 52 in the flange 32 of the thrust bearing race 31 and, if the thrust bearing cage 34 begins to move excessively axially, this excessive movement and the race extending radially to a point far enough to be contacted by the cage 34 to prevent possible escape of the cage.

The projections 50 thus serve to aid in positioning the thrust bearing race 31 on the radial bearing race 17 and to maintain the cage 34 from excessive axial movement.

If desired, the flange 32 of FIGS. 3 and 4 may be short enough to extend to the bottom of the cutout 42 or 52 as shown, and the projections 44,50 may be identical to each other. It may be a complete annular projection to perform the function.

For assembly into the housing, the combined radial-thrust bearing assembly of the present invention is placed into the bore 14 of the housing 16 by pressing on the inner flange 32 of the thrust bearing race 31.

This force is transmitted through the shoulder 20. Radial bearing race 17 is moved into bore 14- until thrust bearing race 31 contacts housing 16.

This can be applied directly to the roller 36 or to the thrust bearing race 4.
This is done without applying pressure indirectly to the roller 36 via a thrust bearing race such as 6.

Thus, while the integral radial-thrust bearing assembly is inserted into the housing 16, the thrust bearing axis 30
is not damaged.

Once the combination radial-thrust bearing is in position, the rotating shaft 10 is introduced into the bearing and the large diameter portion 12 is rotated directly against the rollers 36 (if no thrust bearing race 46 is present) or until it abuts the thrust bearing race 46. Pushed in.

In the embodiment shown in Figure 5.6.7, the thrust bearing race does not have an inner flange.

Instead, an outer flange 60 is provided having a radially inwardly curved protrusion 62 to retain the thrust bearing cage in assembly.

A second thrust bearing race can also be provided in each figure.

In FIG. 5, the flat raceway portion of thrust bearing race 31 is joined to annular portion 64 of radial bearing race 66. In FIG.

During assembly into the housing, forces are applied to the inner area of the thrust bearing race 31 opposite the shoulder.

In FIG. 6, the annular portion 6 of the radial bearing race 66
An axial extension 68 from 4 is folded back around the inner periphery of the flat thrust bearing race to form a mechanical connection.

This connection may be a complete annular projection 70 or a plurality of individual projections from an axial extension.

Upon assembly into the housing, an axial force is applied to the coupling projection, the projection transmits the force to the race, the race transmits the force to the annular portion of the radial bearing race, or - next installation the force is The thrust bearing race may be applied radially inwardly from the thrust bearing cage passage.

In FIG. 7, the thrust bearing race 31 has an inner flange 72 that is bent away from the thrust bearing rollers and connects inside the inner periphery of the radially inwardly turned shoulder of the radial bearing race.

Upon assembly into the housing, forces are applied radially inwardly of the thrust bearing cage to the thrust bearing race and through this flat race to the annular shoulder.

[Brief explanation of the drawing]

1 is a partial front view of one preferred embodiment of a combination radial thrust bearing of the present invention; FIG. 2 is a partial front view taken along line 2--2 of FIG.
3 is a cross-sectional view along line 3--3 of FIG. 1; FIG. 4 is a view similar to FIG. 3 showing an alternative embodiment of the invention; FIG. FIG. 6 is a cross-sectional view of still another embodiment of the present invention, and FIG. 7 is a cross-sectional view of still another embodiment of the present invention. 10... Rotating shaft, 16... Housing, 17... Radial bearing race, 18...
...Radial bearing raceway, 20...Annular shoulder, 2
2... Axial extension part, 24... Cage, 28... Rolling member, 30... Thrust bearing raceway, 31... Thrust Bearing race, 32...Inner flange, 34...Cage, 36...Roller, 40...Protrusion,
42...Cutout, 44...Protrusion, 46
... Thrust bearing race, 48 ... Tab, 50 ... Protrusion, 52 ... Cutout.

Claims (1)

Claims: 1. An axially extending radial bearing race 17.66 for a rolling member having an axially extending raceway 18 and a radially inwardly extending annular portion 20.64; a thrust bearing race 31 for a rolling member extending in the direction;
a thrust bearing cage 34 having a rolling member 36 and an inner periphery; and mechanisms 40, 44, 50, 62 for retaining the thrust bearing cage from excessive axial movement;
a radial bearing rolling member 28, the thrust bearing race 31 being a separate member and having at least a portion thereof extending radially inwardly of the inner periphery of the thrust bearing cage 34; 64, which exerts a force on the radially inner portion of the radially extending thrust bearing race 31 and the annular portion 20.64 of the radial bearing race 17.66 to move the bearing into the housing. A combination radial thrust bearing characterized in that it can be assembled into one. 2. The combination radial thrust bearing of claim 1, wherein a portion of the thrust bearing race is joined to a radially inwardly extending portion 64 of the radial bearing race 66. 3. The radially inwardly extending annular portion of the radial bearing race 17.66 is an annular shoulder 20, 64, and an axial extension 22.68 is integrally connected to the annular shoulder and includes an axial extension. A protruding surface 40.44 in which at least a part of the circumference of the part is bent around the inner periphery of the thrust bearing race.
．． 50.70. The combination radial thrust bearing of claim 1 comprising: 4. The combination according to claim 1, wherein the extension portion 72 is integrally coupled to the thrust bearing race 31 and connected to the inner periphery of the annular portion 64 extending radially inwardly of the radial bearing race 66. Radial thrust bearing. 5. The radially inwardly extending portion of the radial bearing race 17 is an annular shoulder 20 that connects the radial bearing race to an axial extension 22 having an outer diameter smaller than the outer diameter of the radial bearing race, and the thrust The bearing race 31 has an axial inner flange 32 such that a portion of the radially extending thrust bearing race 31 is in assembly contact with the radial bearing race shoulder 20 and the axial inner flange 32 is in contact with the radial bearing race scrap shoulder 20 . A combination radial thrust bearing as claimed in claim 1 in assembly contact with the outside of the axial extension. 6. A combination radial thrust bearing according to claim 5, wherein a coupling mechanism is provided for coupling the thrust bearing race flange 32 and the radial bearing race extension 22. 7. The coupling mechanism includes a plurality of circumferentially spaced cutouts 42, 5 formed in the flange 32 of the thrust bearing race.
2 and a plurality of protrusions 44,50 on the extension 22 of the radial bearing race adapted to fit into corresponding cutouts. 8. Each protrusion 50 on the axial extension 22 of the radial bearing race 17 extends through the cutout 52 and extends sufficiently to retain the thrust bearing cage 34 from excessive axial movement. A combination radial thrust bearing according to claim 7 which is unusually long.